These Brown Butter Brookies combine rich, chewy brownie with gooey chocolate chip cookie — both made with nutty, golden brown butter for next-level flavor.
Brownie Layer:
1/2 cup browned butter
1/2 cup granulated sugar
1/4 cup brown sugar
1 large egg
1 tsp vanilla extract
1/3 cup unsweetened cocoa powder
1/2 cup all-purpose flour
1/4 tsp salt
1/2 cup chocolate chunks (optional)
Cookie Layer:
1/2 cup browned butter
1/3 cup brown sugar
2 tbsp granulated sugar
1 egg yolk
1 tsp vanilla extract
2/3 cup all-purpose flour
1/4 tsp baking soda
1/4 tsp salt
1/2 cup chocolate chips
Brown butter and divide evenly between two bowls. Let cool.
For brownie layer: mix sugars and brown butter. Add egg, vanilla, cocoa, flour, salt. Stir in chocolate if using. Spread in pan.
For cookie layer: mix brown butter and sugars. Add yolk, vanilla, flour, soda, salt, and chocolate chips.
Drop cookie dough over brownie layer and spread gently.
Bake at 350°F for 25–30 minutes until golden and set.
Cool before slicing.
Store in airtight container at room temp or freeze up to 2 months.
For neat slices, chill before cutting and wipe knife between cuts.